44. Ceres, Vesta and Psyche are all located in the asteroid belt, but Ceres is classified as a dwarf planet whereas Vesta and Psyche are classified merely as asteroids rather than dwarf planets. The primary factors in this difference of classification are: a) Ceres, Vesta and Psyche all orbit the Sun, but only Ceres is large enough for its gravity to have pulled it into an approximately round shape. b) Ceres, Vesta and Psyche all orbit the Sun, but the orbits of Vesta and Psyche are very eccentric and tilted, taking them deep into the Oort cloud. c) Ceres orbits the Sun, but Vesta and Psyche are much closer to Jupiter, and have complex orbits around both Jupiter and the Sun d) Ceres, Vesta and Psyche all orbit the Sun, and have approximately the same size but Ceres is primarily a rocky object with some ice, whereas but Vesta is primarily made of icy material and Psyche is primarily metallic e) Ceres, Vesta and Psyche all orbit the Sun, and have approximately the same size but Ceres is massive enough and cool